But that's the thing, they're mercenaries. They can do whatever they want in war times because they're not affiliated with any government, so that's why these freaks roll around in their pickup trucks shooting at whatever looks fun to kill.
I even heard a rumor Blackwater kidnapped a bunch of "terrorists", brought them back to their headquarters in North Carolina, and use them as torture specimens. The fact the government employs these goons really demonstrates how evil this country can be.